We use a main stream channel manager. However we have spotted a flaw with them as they do not always import modifications, cancellation to the channel manager diary. Therefore there is a potential for double bookings if a booking is modified (as the diary does not get populated). This has happened on a couple of occasions for us as we have not manually picked this up (why would we if use systems?..).
Does anyone have any recommendations for a channel manager that does pick up all modifications and updates to bookings in the channel manager?